| 摘要 |
A diffuser for a pulverized coal delivery pipe near an elbow connection to a burner nozzle. A diffuser structure is located in the pipe adjacent the elbow outlet, with both radial and axial diffuser elements for diffusing radial and axial components of coal concentrations between the elbow and the nozzle. In a preferred form, the elbow is formed with an access hatch aligned with the pipe at the elbow outlet, and the diffuser structure is formed as a drop-in insert that can be installed and accessed through the hatch. The diffuser has a venturi inlet that produces an initial diffusion effect with minimal pressure drop before the coal flow reaches the radial and axial collision-style diffuser elements.
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